:root {
  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: #242424;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background-color: #f9f9f9;
            color: #333;
            line-height: 1.6;
            padding: 20px;
            background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        header {
            text-align: center;
            margin-bottom: 40px;
            padding: 30px;
            background: linear-gradient(45deg, #2e7d32 0%, #388e3c 100%);
            color: white;
            border-radius: 15px;
            box-shadow: 0 10px 20px rgba(46, 125, 50, 0.3);
        }
        
        h1 {
            font-size: 2.8rem;
            margin-bottom: 10px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
        }
        
        .subtitle {
            font-size: 1.2rem;
            font-weight: 300;
            max-width: 800px;
            margin: 0 auto;
        }
        
        .timeline {
            position: relative;
            padding: 40px 0;
        }
        
        .timeline::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            width: 4px;
            background: #4caf50;
            border-radius: 2px;
            transform: translateX(-50%);
        }
        
        .timeline-item {
            position: relative;
            margin-bottom: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .timeline-item:nth-child(odd) {
            flex-direction: row-reverse;
        }
        
        .timeline-date {
            flex: 0 0 150px;
            text-align: center;
            position: relative;
            z-index: 1;
        }
        
        .timeline-date::after {
            content: '';
            position: absolute;
            width: 30px;
            height: 30px;
            background-color: #fff;
            border: 4px solid #4caf50;
            border-radius: 50%;
            top: 45px;
            left: 60px;
            z-index: 2;
        }
        
        .timeline-item:nth-child(even) .timeline-date::after {
            left: -90px;
        }
        
        .timeline-date h3 {
            font-size: 1.8rem;
            color: #2e7d32;
            background: rgba(255,255,255,0.9);
            display: inline-block;
            padding: 10px 20px;
            border-radius: 50px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.1);
        }
        
        .timeline-content {
            flex: 1;
            background: white;
            border-radius: 15px;
            padding: 25px;
            box-shadow: 0 8px 30px rgba(0,0,0,0.15);
            position: relative;
            transition: all 0.4s ease;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        
        .timeline-content:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.2);
        }
        
        .timeline-img {
            width: 300px;
            height: 230px;
            border-radius: 12px;
            margin-bottom: 20px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.2);
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
            border: 5px solid #f0f0f0;
        }
        
        .params-table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            background-color: #f9f9f9;
            border-radius: 8px;
            overflow: hidden;
        }
        
        .params-table th, .params-table td {
            padding: 12px 15px;
            text-align: left;
            border-bottom: 1px solid #e0e0e0;
        }
        
        .params-table th {
            background-color: #4caf50;
            color: white;
            font-weight: normal;
        }
        
        .params-table tr:nth-child(even) {
            background-color: #f2f2f2;
        }
        
        .stage {
            font-size: 1.8rem;
            color: #f57c00;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 2px dashed #c8e6c9;
            text-align: center;
        }
        
        .description {
            font-size: 1.1rem;
            color: #555;
            line-height: 1.7;
            margin-bottom: 15px;
            text-align: justify;
        }
        
        .tip {
            background-color: #fff8e1;
            padding: 12px;
            border-radius: 8px;
            font-style: italic;
            margin-top: 10px;
            border-left: 4px solid #ff9800;
            width: 100%;
            box-sizing: border-box;
        }
        
        @media (max-width: 900px) {
            .timeline::before {
                left: 30px;
            }
            
            .timeline-item {
                flex-direction: column !important;
                align-items: flex-start;
                margin-left: 60px;
            }
            
            .timeline-date {
                text-align: left;
                margin-bottom: 20px;
                padding: 0;
                position: relative;
            }
            
            .timeline-date h3 {
                display: inline-block;
                margin-left: 20px;
            }
            
            .timeline-date::after {
                left: -45px;
                top: 45px;
            }
            
            .timeline-item:nth-child(even) .timeline-date::after {
                left: -45px;
            }
            
            .timeline-img {
                width: 100%;
                height: 250px;
                margin: 20px 0;
            }
            
            .timeline-content::before {
                display: none;
            }
        }
        
        footer {
            text-align: center;
            padding: 30px;
            margin-top: 40px;
            color: #757575;
            font-size: 1rem;
            background: rgba(255,255,255,0.7);
            border-radius: 15px;
            border-top: 3px solid #4caf50;
        }